A kinetic study of atom transfer radical polymerization of styrene with bis(2-pyridyl)ethylenedimethanimine derivative ligands

Authors : Hülya ARSLAN, Yasemin KÜÇÜK, - Ayfer

Pages : 824-831

Doi:10.3906/kim-1302-64

View : 10 | Download : 5

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Atom transfer radical polymerization insert ignore into journalissuearticles values(ATRP); of styrene was carried out with multidentate nitrogen-based ligands, namely N,N`-bis[phenylinsert ignore into journalissuearticles values(pyrid-2-yl);methylene] ethane-1,2-diamine insert ignore into journalissuearticles values(BPDA); and N,N`-bis[methylinsert ignore into journalissuearticles values(pyrid-2-yl);methylene] ethane-1,2-diamine insert ignore into journalissuearticles values(BMDA);, and catalyst systems at catalyst/ligand molar ratios of 1/0.33, 1/0.5, 1/1, and 1/1.5 by using 2 different initiators, insert ignore into journalissuearticles values(1-bromoethyl);benzene insert ignore into journalissuearticles values(BEB); and ethyl-2-bromopropionate insert ignore into journalissuearticles values(EBP);. Linear first-order kinetic plots were observed for ATRP of styrene upon using BPDA as a ligand with both initiators. Even though the linear slopes indicate that radical concentration remains constant during reactions, high molecular weights were obtained at low conversion and showed a linear relation thereafter. To investigate the molecular weight effect, reactions were also performed in the presence of insert ignore into journalissuearticles values(1-bromoethyl);benzene initiator in dimethylformamide insert ignore into journalissuearticles values(DMF); for BPDA and in toluene for BMDA using a catalyst/ligand ratio of 1/1.
Keywords : Polymer synthesis, controlled radical polymerization, ATRP, imine ligand